The legal heirs of your father are his widow i.e second wife and children from first and second marriage, each one of whom, has succeeded equally to his property as he died intestate. The 2005 amendment relates to only ancestral property, and is thus not applicable to your case. The right of daughters is at par with that of sons in the self acquired property of parents. Any one of the heirs can file a suit for partition to cull out his/her share in the property.